<template>
    <div>
        <h1 v-text="msg" ref="title"></h1>
        <button ref="btn" @click="showDOM">点我输出上方的DOM元素</button>
        <School ref="sch"/>
    </div>
</template>

<script>
    //引入School组件
    import School from './components/School'

    export default {
        name: 'App',
        components: {School},
        data() {
            return {
                msg: '欢迎学习Vue！'
            }
        },
        methods: {
            showDOM() {
                console.log(this.$refs.title) //真实DOM元素
                console.log(this.$refs.btn) //真实DOM元素
                console.log(this.$refs.sch) //School组件的实例对象（vc）
            }
        },
    }
</script>
